Four lugged lamp base



FIG. 1 is a top, front and right side perspective view of a four lugged lamp base, showing our new design;

FIG. 2 is a top, rear and left side perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a top plan view thereof.

The broken line showing of the environment is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a four lugged lamp base, as shown and described. 